Combustion chamber



Aug. 8, 1944. J. F. sT An'z 2,355,572

COMBUSTION CHAMBER I Filed April 29, 1943 2 Sheets-Sheet :1

Patented Aug. 8, 1944 UNITED STATES PATENT OFFICE COMBUSTiON CHAMBER John F. Straitz, Philadelphia, Pa, assignor to National Airoil Burner Company, Incorporated, a corporation of Delaware Application April 29, 1943, Serial No. 484,980

1 Claim.

This invention relates to improvements in combustion chambers, especially adapted for combustible mixture of air and fuel oil,

The object is to provide means for securing complete combustion within the combustion chamber; to secure a maximum transfer and distribution of heat to the critical parts of the furnace or heater, and at the same time to protect the stack or smoke pipe from excessive temperatures; and thus preventing heat losses in chimney.

By the means herein shown and described, is secured a substantial saving of fuel oil. By the saving of fuel the walls of the water leg, or the surfaces of the boiler and passes, are kept clean and free from carbon or soot.

Referring to the drawings, which illustrate merely by way of example, suitable means for the embodiment of my invention:

Fig. 1 is a central vertical section showing the combustion chamber equipped in accordance with my invention.

Fig. 2 is an under-side plan view of one of the baffles or lids.

Fig. 3 is a side elevation of same.

Fig. 4 is a rear view in perspective of the firepots and lids,

Fig. 5 is a front view in perspective of same.

Fig. 6 is a vertical section of the fire-pot and lids.

Fig. '7 is a plan view of the fire-pot assembly.

All of the figures are approximately on the same scale, except Fig. 1, which is on a reduced scale.

Similar numerals refer to similar parts throughout the several views.

Referring especially to Fig. 1, the upper part 54 is intended to represent, more or less diagrammatically, a heating chamber of a water heating furnace I5.

The combustion chamber I6 is lined or surrounded by a refractory wall 11, pre-shaped in sections, for convenience in assembling, and fitted to form the said combustion chamber or fire-pot. A filling, indicated by numeral I9, is packed at selected points between the wall forming the pot, and the surrounding shell or casting l8. The two front pot-sections, 22 and 23, are recessed to provide a port 2| for receiving the burner nozzle 20. It will be noted that the fire-pot sections are so shaped and dimensioned as to provide a continuous top wall, the rear portion of which extends in a horizontal plane, while a forward portion is inclined to the horizontal, thus providing a greater opening forwardly, The burner nozzle 26 delivers to the combustion chamber l6 through said port 2i, which is formed by the recessed parts of sections 22 and 23. A smoke pipe is indicated at 38.

Upon the tops of the fire-pot sections are mounted lids or baiiies 30 and 3|. These lids are in the form of half circle segments, each segment is provided with three legs; segment 30 having legs 32, 33 and 34 and segment 3i having legs 35, 36 and 31.

As will be noted, referring especially to Figs. 4 and 5, the two segments 30 and 3! are adapted to form a complete circular disk. These segments however are spaced apart in different horizontal planes by the legs 35, 36 and 37 of segment 3!, with the legs resting upon the top of lid thus leaving a space 40 between the two segments for the flow of heated air therethrough from combustion chamber 16.

The lid 3| is provided with the legs 35 and 36 resting upon the top of lid 30, while the leg 37 rests upon upwardly projecting formations of the members 25 and 21, thus providing relatively large openings in the upper parts of members 22 and 23, and flanking the said upwardly projecting formations.

The flame and heated air rising in the combustion chamber encounter the under-sides of lids 30 and 3|; thus baffling the flow from the combustion chamber or fire-pot It to the space above said lids, which is primarily a heating chamber, whereupon the flow thus baflled will react turbulently to pass through the spaces between lids and pot elements.

In accordance with the method and means above described, the combustion of the combustible mixture is substantially complete within the combustion chamber or fire-pot, and the heat and flame immediately rises in the said chamber to encounter the lids, squarely and without restriction, and because of said encounter, is deflected in several directions to all parts of the heating chamber.

The result of this action is a turbulence, which secures the substantially complete combustion in the combustion chamber or fire-pot, before it passes through the passages or spaces between the lids and pot-elements, and consequently the maximum of heat transfer to the water legs i5 is secured.

The fill I9 is a highly heat insulating substance, such as Micylight.

What I claim is:

In combination with a furnace having a combustion chamber in the lower part thereof and a heating chamber in the upper part thereof, the combustion chamber comprising a fire-pot formed of refractory sections open to the heating chamber and a pair of segmental baflle lids, each provided with at least three supporting legs,

: all of the legs of one segment resting directly upon the top wall of the fire-pot, and two legs of the other segment resting upon the first segment, and the other leg resting directly upon the top of the wall of the fire-pot.

JOHN F. STRAITZ 

